PIC16F753 Datasheet, PDF (137/238 Pages) Microchip Technology – 14/16-Pin, Flash-Based 8-Bit CMOS Microcontrollers

PIC16F753/HV753
15.10 Zero Latency Filter
In high-speed operation, and under proper circuit
conditions, it is possible for the comparator output to
oscillate. This oscillation can have adverse effects on
the hardware and software relying on this signal.
Therefore, a digital filter has been added to the
comparator output to suppress the comparator output
oscillation. Once the comparator output changes, the
output is prevented from reversing the change for a
nominal time of 20 ns. This allows the comparator
output to stabilize without affecting other dependent
devices. Refer to Figure 15-3.
FIGURE 15-3:
COMPARATOR ZERO LATENCY FILTER OPERATION
CxOUT From Comparator
CxOUT From ZLF
TZLF
Output waiting for TZLF to expire before an output change is allowed
TZLF has expired so output change of ZLF is immediate based on
comparator output change
 2013 Microchip Technology Inc.
Preliminary
DS40001709A-page 137